Schurter STTP 9550: Three-Terminal Fuses for Battery System Protection
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Protection for High-Power Battery Systems: The Challenge of Safety and Energy Density
Lithium-ion battery-based systems require protection solutions capable of responding to different operating conditions without compromising the overall design. In applications such as power tools, energy storage systems, UPS systems, e-bikes, e-scooters, and battery-powered AGVs, overcurrent protection must also be integrated into compact, high-power-density designs. Schurter’s STTP 9550 family is specifically developed for these types of applications.
Schurter STTP 9550: Three-Terminal Fuses for Battery Protection
The STTP 9550 are three-terminal fuses that combine conventional overcurrent protection with an overload protection function activated via a trigger terminal. This controlled activation allows the charge and discharge paths to be disconnected under critical conditions, even in the event of a failure of the protection IC or FETs. Gold-plated terminals provide low and stable contact resistance, high signal integrity, and corrosion resistance.
The family offers versions rated at 30, 45, 60, and 75 A, with a maximum voltage of 100 VDC and configurations for battery packs with 1 to 24 cells in series, depending on the part number. The compact 9.5 × 5.0 × 1.9 mm package facilitates integration into high-power-density designs.
STTP 9550 Applications: Power Tools, UPS Systems, E-Bikes, E-Scooters, and AGVs
The STTP 9550 is designed for high-power battery systems and industrial and mobility applications, including power tools and cordless tools, vacuum cleaners, UPS systems, e-bikes, e-scooters, battery-powered AGVs, and off-road vehicles. In addition to its corrosion resistance and low contact resistance, the component is designed to meet miniaturization and high-power-density requirements. It is UL approved and designed for redundant protection architectures.
RC Microelectrónica, official Schurter distributor for Spain and Portugal
For engineering teams seeking a compact battery‑protection solution, the STTP 9550 family provides a combination of overcurrent protection and controlled activation via a third terminal. At RC Microelectronics, we are official Schurter distributors for Spain and Portugal. If you need help selecting the right reference, reviewing available variants, or evaluating its integration into your application, our team can support you with the technical and commercial guidance you need.
